Python is an unambiguous, easy-to-read, general-purpose high-level programming language which considers paradigms of structured, procedural, and object-oriented programming.
Python is a versatile language that can be used in a variety of settings, from web development to scientific computing. Here are some of the most popular companies that use Python:
Google: Google makes extensive use of Python in its web search systems. The language has also been used in several of their open source projects, such as the Google App Engine.
Yahoo!: Yahoo! uses Python for a variety of purposes, including powering their mapping services and running several of their key websites.
Dropbox: Dropbox is another company that relies heavily on Python for its backend systems and infrastructure.